Cap for a bottle



FIG. 1 is an upper perspective view of a cap for a bottle showing my new design;

FIG. 2 is a front elevation view, a back elevation view thereof being identical, a side elevation view being identical, and an opposite side elevation view thereof being identical;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken lines in FIG. 4 are shown for the purpose of illustrating parts of the article that form no part of the claim. 

CLAIM The ornamental design for a cap for a bottle, as shown and described. 